Ventilator



(No Model.) 4 2 Sheets-Sheet 2.

J.,1V.[. AYER l l VENTILATOR.

` No. 291,666; Patented Jam. 8, 1884.

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JOHN M. AYER, OF CHICAGO, ILLINOIS.

VENTILATOR.

SPECIFICATION forming part of Letters Patent No. 291,666, dated January8, 1884. Application inea september 29,1883. (No model.)

To all whom it 111,04/- colwernl: j

Beit known that I, JOHN M. AYER, a citizen of the United States,residing at Chicago,

in the county of Cookand State of Illinois, have invented certain newand useful Improve-` ments in Ventilators; and I hereby declare thefollowing to be a full, clear, and exact descrip-` tion of the same. l

My invention relates to ventilators for sup plying fresh air in anydesired quantity to an inclosed space; and the object 'of my inventionis to provide a device which,when placed in position to admit a supplyof fresh air into an inclosed space, may be y regulated immedi- I 5ately and Without difficulty to permit air to enter in any reguiredquantity, or, when desired, entirely to shut off the supply of `air.

' My l invention consists, first, in providing two screwthreadedcylinders, one litting up-` on the other, one of which is open at bothends to serve as the air-duct through awall, window-sash, or the like,and the other of which is closed at one end and provided with sideperforations,whereby the turning of' the latter moves it forward andback with relation to the other by reason of the screw-threads, thuspermitting the side openings to be opened, closed, and graduated atwill; secondly, in providing alventilator which, while it possesses 3othe features just described, is particularly adapted for use inconnection with a windowsash,whereby the handle by means of which 4theventilator is opened `and closed `may be t used to open and close thewindow; and, third- 3 5 ly, in the specific construction which I preferto employ for carrying out my invention.

Referring to the drawings, Figure l represents my invention attached tothe sash of a window and viewed from the inside of a room. Fig. 2 is asectional view of my device, taken on the line 22 of Fig. l, showing thesame as it appears when closed to prevent the ingress of air and as itappears when opened to per- Y mit such ingress; Fig. 3, a view inelevation `of the hollow cylinder or duct forming a part of my device,and provided with screw-threads for the adjustment of the outer cylinderor cap;

Fig. 4, a similar view of the closed cylinder or cap, showing theapertures formed around its over the latter.

circumference; and Fig. 5, a section taken on the line 5 5 of Fig. 3,viewed in the direction ofthe arrow-heads,showin g a means for rigidlysecuring the inner duct or cylinder to the material surrounding theopening formed to admit the device, and showing also a wire screencovering the opening through which air enters from without. Y

The device, of which two are shown adjusted to a Window-sash in Figs. land 2 of the drawings, is formed in two parts, preferably of metal,though other material may be used. I have preferred to show it in thesefigures in this connection for the reason that I am thus enabled toillustrate its adaptability by employing the oruarnented projection fromthe closed end ofA the outer tube or cylinder,which is primarilyintended to afford a means of regulating the supply of air through theventilator, as a means of raising and lowering the window. The part A isahollow cylinder in form,having a flange, e, projecting laterally fromits outer edge, and provided with screw-threads u., cut around itsexterior surface below the lugs t, hereinafter to be described, thescrew-threads being either of the square form shown in the devicerepresented-on the left of Fig. 2 and in Fig. 3, or of the form shown inthe device on the right side of the saidfgure.

B is a hollow cylinder, likewise preferably formed of metal, and madesomewhat larger in diameter than the cylinder A, to fit snugly One endof this cylinder is closed to form a cap, and it is provided with alaterally-projecting flange, o. The closed cylinder or cap B isscrew-threaded on its internal surface, as shown at a in Fig. 2 of thedrawings,to correspond with the screw-threads a formed upon the cylinderA.

In the body of the closed cylinder or cap B, and encircling the same,are formed apertures s, preferably in rows equidistant apart, and in anydesired number and of any desired size or form. l

'Io utilize my device, a hole is formed in the desired position throughthe material (generally wood) into which the ventilator is to be placed,the said hole being sufficient in diameter to receive and snuglyaccommodate the closed outer cylinder or cap, B. rIlhe cylinder A isrigidly held in` place to prevent it from slipping around, when operatedas hereinafter described, by means of triangular-shaped lugs t, formedin the casting or attached in any suitable manner upon the outer surfaceof the cylinder A, near the outer edge thereof. The lugs t, which may beof any desired size and number, extend in a longitudinal and backwarddirection along the outer surface of the cylinder A a sufficientdistance to render the screw-threaded portion of the said cylinder ofequal length with the closed cylinder or cap B. These lugs somewhatexceed in heightthe external diameter of the cap B, which abuis at itsopen end against them, whereby they form a stop when the ventilator isclosed, in order that they may be driven into the' material surroundingthe hole provided to contain the device, thus to hold it securely inplace. If desired,l the said lugs may be entirely omitted and thecylinder A secured in place by means of screws r passing through screw-holes formed in the flange o, as shown in the right-hand portion of Fig.2 in the drawings. The closed cylinder or cap B is capable of an inwardand an outward movement upon the cylinder A by means of the engagementofthe internal screwthreads upon the said cap B with the screwthreadsformed upon the external surface of the said cylinder A, as hereinafterdescribed.

To operate my device, supposing it to occupy the position shown at theleft-hand side of Fig. 2 in the drawings, in which position it isimpossible for air to pass, owing to the p0- sition of the cylinder Awithin the closed cylinder or cap B, and to the close proximity of theclosed end of the said outer cylinder against ,the inner end or openingofthe cylinder A, besides the assistance of the washer q, of suitablematerial, which is of the exact size of the inside diameter-of theclosed cylinder or cap B. The'cl'osed end of the cap B is provided withan ornamented handle, p, cast thereon o r otherwise attached thereto,and shown in the drawings as comprising a hand holding a bar, -thoughother suitable means-such as a ring or knob could be employed with equaladvantage, strength of material and convenience of form being essentialfeatures readily to open and close the ventilator or to raise andlowerthe window when the device is applied to a window-sash.

To permit the ingress of air it is only necessary to turn the closedcylinder or cap Bby means of the handle p, whereby the said cap will bemoved backward to free one row of the apertures s from contact with thecylinder A, thus admitting the air through the said cylinder into thespace to be ventilated. As more and more air is required, the operationof turning the cylinder maybe repeated until the full length of the capB projects inward, thus admitting the air into the inclosed space to beventilated through all the apertures in the outer cylinder or cap, B.

vornamenting the iianges as well as the handle, as hereinbeforesuggested. The flanges, when the device is closed, rest flush againstthe material through which the ventilator passes.

My invention can be employed with equallydesirable results for,Ventilating houses, passenger, refrigerator, and sleeping cars, ice.

houses, ice-boxes, Src.

No particular dimensions for the device need be given, for thesenecessarily vary with the various objects to which it may be attached.

The foregoing description refers to the preferred way of constructing myventilator. This preference is given for the reason that with thatconstruction no screw-threads are visible upon the part B when it ismade to nt outside the part A, as described.

I am aware that it is not new to form 'ventilators of two hollowcylinders, one open at both ends and the other closed at one end andprovided with openings in its side, theair being admitted through suchopenings and shut off bysliding the closed cylinder longitudinallywithin the other.

What I claim as new, and desire to secure byl Letters Patent, is-

1. In a ventilator, the combination of two hollow cylinders, one open atboth ends to serve as the air-passage and to fit within an opening in awindow-sash, wall, or the like, and the other closed at one end, andprovided with side perforations, each being provided with screw-threads,and fitting one into the other, whereby the turning of the perforatedcylinder carries it back and forth with relation to the other and opensand closes the perforations, substantially as described.

2. In a ventilator, the combination of a cylinder, A, screw-threaded onits outer surface and open at both ends, and a cylinder, B,

closed at one end and screw-threaded on its interior surface, andadapted to fit upon the said cylinder Af, and provided with apertures s,substantially as described.

l 3; In a ventilator, the combination, with a cylinder, A,screw-threaded on its outer surface, and provided with a flange, o,screen C,

IOO

IIO

upon the cylinder A7 substantially as dep, attached to the cap B andprojecting outsoribed. Ward from the sash7 substantially as described,4. `The combination, with a Window-sash, and for the purpose set forthof the cylinder A, provided with@ flange, v, JOHN M. AYER. 5 and screenC, and lugs t, for securing the cyl- In presence of nder in position,cylinder B, provided With DOUGLAS DYRENFORTH,

a ertures s and aned cover v and handle CHAs. E. DEANE.

